Run `cargo clippy`.

src/lib.rs

@@ -471,6 +471,7 @@ impl Raft {
         None
     }
 
+    #[allow(clippy::too_many_arguments)]
     async fn count_vote_util_cancelled(
         me: Peer,
         term: Term,

src/rpcs.rs

@@ -90,8 +90,8 @@ pub fn register_server<S: AsRef<str>>(
     network: &Mutex<Network>,
 ) -> std::io::Result<()> {
     let mut network = network.lock();
-    let server_name = name.as_ref().clone();
-    let mut server = Server::make_server(server_name.clone());
+    let server_name = name.as_ref();
+    let mut server = Server::make_server(server_name);
 
     let request_vote_rpc_handler = RequestVoteRpcHandler(raft.clone());
     server.register_rpc_handler(